Phys.Rev. C 107, 014326 (2023)

R.Chakma, A.Lopez-Martens, K.Hauschild, A.V.Yeremin, O.N.Malyshev, A.G.Popeko, Yu.A.Popov, A.I.Svirikhin, V.I.Chepigin, E.A.Sokol, A.V.Isaev, A.A.Kuznetsova, M.L.Chelnokov, M.S.Tezekbayeva, I.N.Izosimov, O.Dorvaux, B.Gall, Z.Asfari

Investigation of isomeric states in ²⁵⁵Rf

NUCLEAR REACTIONS ²⁰⁷Pb(⁵⁰Ti, 2n), E=253 MeV; measured reaction products, evaporation residues (ER), Eγ, Iγ, ce, Eβ, (ER)γ-coin, ceγ-coin, (ER)←ce)-coin; deduced isomer levels population, isomeric ratios. ²⁵⁵Rf; deduced levels, J, π, δ, T_1/2 of newly discovered isomeric states, high-spin states, configurations of isomeric states. Evaporation residues separated using the velocity filter SHELS and transported to the focal-plane detection setup - GABRIELA detector array for γ and internal conversion electrons at FLNR (JINR, Dubna).

RADIOACTIVITY ²⁵⁵Rf(α), (SF)[from (⁵⁰Ti, 2n), E=253 MeV]; measuredEα, Iα, fission fragments; deduced T_1/2 of α-decay and fission, branching ratios. ²⁵⁵Rf(β⁺)(EC); deduced upper limit of β⁺/EC decay branch. Decay of implanted evaporation residues measured by large-area double-sided silicon strip detector (DSSD).

doi: 10.1103/PhysRevC.107.014326